Thanks for the pix & post. Building my own is another option I have on the table as well.
I may just leave the car alone too, not like I'm planning on body twisting 1.40's 60 ft times … LOL
Not much to make. If you want to just cut it off about 3 in shorter than 4ft. You don't have to filet the end of the piece. You can just but it in up front. Then it's just the three straight cuts to open up the rear frame.